500kV变压器多维状态监测与故障诊断  

Multi-dimensional state monitoring and fault diagnosis of 500 kV Transformer

作　　者：张霖[1] 杨超[1] 李诗勇[1] 张丽娟[1] 申峻[1] ZHANG Lin, YANG Chao, LI Shi Yong, ZHANG Li Juan, SHEN Jun(Guiyang Power Supply Bureau, Guiyang 550001 Guizliou, Chin)

机构地区：[1]贵阳供电局,贵州贵阳550081

出　　处：《电力大数据》2018年第2期67-73,共7页Power Systems and Big Data

摘　　要：为提升变压器故障诊断水平并有效实现状态检修,通过一起500 kV主变压器内部潜伏性故障案例介绍了利用多种在线监测、离线检测等手段与故障诊断方法快速准确查找出变压器故障原因及位置。它通过采用油色谱检测、变压器振动及声音检测、容性设备在线监测、变压器局部放电检测、带电测试等多维状态监测技术开展变压器状态评价及故障诊断,并帮助实现对主变压器内部故障的准确定位和制定状态检修策略。该主变在通过状态监测及故障诊断后实现隐患故障快速准确定位,并通过紧急处理重新恢复正常运行状态,从而避免一起重大设备事故发生。结果表明,应用变压器油溶解气体色谱分析检测技术,可通过排除法准确地判断变压器故障性质和严重程度,它是早期发现变压器潜伏性故障特别有效的方法。同时,采用基于交叉小波的变压器振动信号特征量提取方法分析评价结果表明,变压器铁芯发生接地故障后其振动信号存在大量50 Hz谐波分量。借助振动及声音检测技术,能够有助于变压器故障诊断及准确定位,提高设备状态检修效率。To enhance the level of transformer fault diagnosis and effectively implement the state overhaul, together with 500 kV main transformer internal latent failure case introduced the use of a variety of on-line monitoring, off-line testing methods such as fault diagnosis method is rapid and accurate to find out the transformer fault cause and location. It transformer vibration and sound detection, capacitive equipment on-line monitoring, transformer partial discharge detection,multidimensional state monitoring technology such as charged test evaluation and fault diagnosis of transthe accurate positioning of the main transformer internal fault and maintenance strategy. The main transformer in the conditionmonitoring and fault diagnosis after realizing the rapid and accurate positioning, hidden faults and through emergency treatment has resumed normal operation state, so as to avoid the accident of the major equipment. The results showed that the application of transformer oil chromatographic analysis of dissolved gas detection technology, can be accurate to nature and severity of it is the early detection of transformer latent fault particularly effective method. At the same time, based on cross wavelet transformer vibration signal characteristic extraction methods to analyze the evaluation results show that the transformer core ground fault occurred after the vibration signals exist a large number of 50 Hz harmonic component. By means of vibration and sounddetection technology, it can help transformer fault diagnosis and accurate positioning, and improve the efficiency of equipment stateoverhaul.

关 键 词：变压器 状态监测 故障诊断 振动 声音 油色谱分析 

分 类 号：TM7[电气工程—电力系统及自动化]